Hi,

Dawn starts running 5 minutes after Julia does.

Julia runs at an average speed of 8 ft/s : 480ft/min 

Dawn runs at an average speed of 9 ft/s :  540ft/min

how many minutes after Dawn starts running will she catch up with Julia

Translate into an equation: Note: Distance the same for both.  D= rt

 Dawn D = Julia D

  540*x = 480(x+5)

    (60ftpm) x = 2400ft 

      x = 40min   

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